function openPop(destination,winname,scroll,winwidth,winheight) {
  satellite =  window.open(destination,winname,"locationbar=no,directories=no,status=no,menubar=no,resizable=no,scrollbars="+scroll+",copyhistory=no,width="+winwidth+",height="+winheight+"");
  satellite.moveTo(((screen.width/2)-(winwidth/2)),((screen.height/2)-(winheight/2)));
}


function change(name,quelle){

  window.status = " ";
  document.images[name].src = quelle.src;
}

// preload images
pic_0			= new Image();
pic_0.src 		= "art/btn_nav_0_0.gif";
pic_0_hi 		= new Image();
pic_0_hi.src 		= "art/btn_nav_0_1.gif";
pic_1			= new Image();
pic_1.src 		= "art/btn_nav_1_0.gif";
pic_1_hi 		= new Image();
pic_1_hi.src 		= "art/btn_nav_1_1.gif";
pic_2			= new Image();
pic_2.src 		= "art/btn_nav_2_0.gif";
pic_2_hi 		= new Image();
pic_2_hi.src 		= "art/btn_nav_2_1.gif";
pic_3			= new Image();
pic_3.src 		= "art/btn_nav_3_0.gif";
pic_3_hi 		= new Image();
pic_3_hi.src 		= "art/btn_nav_3_1.gif";
pic_4			= new Image();
pic_4.src 		= "art/btn_nav_4_0.gif";
pic_4_hi 		= new Image();
pic_4_hi.src 		= "art/btn_nav_4_1.gif";
pic_5			= new Image();
pic_5.src 		= "art/btn_nav_5_0.gif";
pic_5_hi 		= new Image();
pic_5_hi.src 		= "art/btn_nav_5_1.gif";